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/*
* Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <openssl/crypto.h>
static long saved_argl;
static void *saved_argp;
static int saved_idx;
static int saved_idx2;
/*
* SIMPLE EX_DATA IMPLEMENTATION
* Apps explicitly set/get ex_data as needed
*/
static void exnew(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp)
{
OPENSSL_assert(idx == saved_idx);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
OPENSSL_assert(ptr == NULL);
}
static int exdup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
void *from_d, int idx, long argl, void *argp)
{
OPENSSL_assert(idx == saved_idx);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
OPENSSL_assert(from_d != NULL);
return 1;
}
static void exfree(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp)
{
OPENSSL_assert(idx == saved_idx);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
}
/*
* PRE-ALLOCATED EX_DATA IMPLEMENTATION
* Extended data structure is allocated in exnew2/freed in exfree2
* Data is stored inside extended data structure
*/
typedef struct myobj_ex_data_st {
char *hello;
int new;
int dup;
} MYOBJ_EX_DATA;
static void exnew2(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp)
{
int ret;
MYOBJ_EX_DATA *ex_data;
OPENSSL_assert(idx == saved_idx2);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
OPENSSL_assert(ptr == NULL);
ex_data = OPENSSL_zalloc(sizeof(*ex_data));
OPENSSL_assert(ex_data != NULL);
ret = CRYPTO_set_ex_data(ad, saved_idx2, ex_data);
OPENSSL_assert(ret);
ex_data->new = 1;
}
static int exdup2(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
void *from_d, int idx, long argl, void *argp)
{
MYOBJ_EX_DATA **update_ex_data = (MYOBJ_EX_DATA**)from_d;
MYOBJ_EX_DATA *ex_data = CRYPTO_get_ex_data(to, saved_idx2);
OPENSSL_assert(idx == saved_idx2);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
OPENSSL_assert(from_d != NULL);
OPENSSL_assert(*update_ex_data != NULL);
OPENSSL_assert(ex_data != NULL);
OPENSSL_assert(ex_data->new);
/* Copy hello over */
ex_data->hello = (*update_ex_data)->hello;
/* indicate this is a dup */
ex_data->dup = 1;
/* Keep my original ex_data */
*update_ex_data = ex_data;
return 1;
}
static void exfree2(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp)
{
MYOBJ_EX_DATA *ex_data = CRYPTO_get_ex_data(ad, saved_idx2);
int ret;
OPENSSL_assert(ex_data != NULL);
OPENSSL_free(ex_data);
OPENSSL_assert(idx == saved_idx2);
OPENSSL_assert(argl == saved_argl);
OPENSSL_assert(argp == saved_argp);
ret = CRYPTO_set_ex_data(ad, saved_idx2, NULL);
OPENSSL_assert(ret);
}
typedef struct myobj_st {
CRYPTO_EX_DATA ex_data;
int id;
int st;
} MYOBJ;
static MYOBJ *MYOBJ_new()
{
static int count = 0;
MYOBJ *obj = OPENSSL_malloc(sizeof(*obj));
obj->id = ++count;
obj->st = CRYPTO_new_ex_data(CRYPTO_EX_INDEX_APP, obj, &obj->ex_data);
OPENSSL_assert(obj->st != 0);
return obj;
}
static void MYOBJ_sethello(MYOBJ *obj, char *cp)
{
obj->st = CRYPTO_set_ex_data(&obj->ex_data, saved_idx, cp);
OPENSSL_assert(obj->st != 0);
}
static char *MYOBJ_gethello(MYOBJ *obj)
{
return CRYPTO_get_ex_data(&obj->ex_data, saved_idx);
}
static void MYOBJ_sethello2(MYOBJ *obj, char *cp)
{
MYOBJ_EX_DATA* ex_data = CRYPTO_get_ex_data(&obj->ex_data, saved_idx2);
if (ex_data != NULL)
ex_data->hello = cp;
else
obj->st = 0;
}
static char *MYOBJ_gethello2(MYOBJ *obj)
{
MYOBJ_EX_DATA* ex_data = CRYPTO_get_ex_data(&obj->ex_data, saved_idx2);
if (ex_data != NULL)
return ex_data->hello;
obj->st = 0;
return NULL;
}
static void MYOBJ_free(MYOBJ *obj)
{
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_APP, obj, &obj->ex_data);
OPENSSL_free(obj);
}
static MYOBJ *MYOBJ_dup(MYOBJ *in)
{
MYOBJ *obj = MYOBJ_new();
obj->st = CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_APP, &obj->ex_data,
&in->ex_data);
OPENSSL_assert(obj->st != 0);
return obj;
}
int main()
{
MYOBJ *t1, *t2, *t3;
MYOBJ_EX_DATA *ex_data;
const char *cp;
char *p;
p = OPENSSL_strdup("hello world");
saved_argl = 21;
saved_argp = OPENSSL_malloc(1);
saved_idx = CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_APP,
saved_argl, saved_argp,
exnew, exdup, exfree);
saved_idx2 = CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_APP,
saved_argl, saved_argp,
exnew2, exdup2, exfree2);
t1 = MYOBJ_new();
t2 = MYOBJ_new();
OPENSSL_assert(t1->st && t2->st);
ex_data = CRYPTO_get_ex_data(&t1->ex_data, saved_idx2);
OPENSSL_assert(ex_data != NULL);
ex_data = CRYPTO_get_ex_data(&t2->ex_data, saved_idx2);
OPENSSL_assert(ex_data != NULL);
MYOBJ_sethello(t1, p);
cp = MYOBJ_gethello(t1);
OPENSSL_assert(cp == p);
cp = MYOBJ_gethello(t2);
OPENSSL_assert(cp == NULL);
MYOBJ_sethello2(t1, p);
cp = MYOBJ_gethello2(t1);
OPENSSL_assert(cp == p);
OPENSSL_assert(t1->st);
cp = MYOBJ_gethello2(t2);
OPENSSL_assert(cp == NULL);
OPENSSL_assert(t2->st);
t3 = MYOBJ_dup(t1);
ex_data = CRYPTO_get_ex_data(&t3->ex_data, saved_idx2);
OPENSSL_assert(ex_data != NULL);
OPENSSL_assert(ex_data->dup);
cp = MYOBJ_gethello(t3);
OPENSSL_assert(cp == p);
cp = MYOBJ_gethello2(t3);
OPENSSL_assert(cp == p);
OPENSSL_assert(t3->st);
MYOBJ_free(t1);
MYOBJ_free(t2);
MYOBJ_free(t3);
OPENSSL_free(saved_argp);
OPENSSL_free(p);
return 0;
}
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